Ghost Plane

It was cold and wet when I was outside waiting.  I just happened to look up and in an instant, noticed a plane fade from view.  It was one of those moments when you realized that if you hadn't been in just the right place and looked up at just the right time, that you would have missed it forever.  Of course, you try and calm down assuring yourself almost out loud that how were you to know?  But still, there was no trailing sound of an engine.  It moved as silently as the clouds around it.  It also seemed semi-transparent.  Like, it didn't really push things aside with its aerodynamic frame or from the momentum of its power.  But rather, it passed through the clouds.  Literally, through them.  Afterwards, I thought of a deer in some dense woods.  Despite its mass or antlers, it could effortlessly pass through the trees and brush in an almost wraith-like fashion.  I tried to ponder what nature of pilot or passenger could be transporting in such a technological apparition.